Combined latch and lock



P. T. DAVIS.

GDMBINED LATCH AND LOCK.

(Model.)

Patented Sept. 21, 1886.

IESE

K PETERS. Phhrihghpher. Wilhingwll. D. CA

IINirnn STA-TESr PATENT OFFICE.

FRANKLIN T.,DAVIS, OF MOUNT VERNON, ASSIGNOR TO IIIMSELF, AND AUGUSTUS P. ROOKIVELL, OF EAST CHESTER, NEW YORK'.

COMBINED LATCH AND LOOK.

SPECIFICATION forming part of Letters Patent No. 349,571, dated September 21, 1886.

Application filed Juno 10, 1886. Serial No. 204,769. (Model.) 4

To all whom, it may concern:

vBe it known that I, FRANKLIN T. DAvisa citizen of the United States, residing at Mount Vernon, in the county of Testchester and Stateof New York, have invented new and useful Improvements in Combined Latches and Locks, of which the following` is a specification. This invention relates to a lock for doors; and it consists of certain novel features of construction, whichare fully pointed out in the following specification and claims, and illusfrom the casing.

trated' Vin the accompanying drawings', in which- 4 Figure l represents a view of my lock when the iaceplate has been removed, showing the position of the parts as it is being unlocked from the outside by the key. Fig. 2 is a similar view showing it unlocked and in position to have the latch thrown back by means of the door-knobs. Fig. 3 isa similarl view showing it locked from the inside. Fig. 4L is avertical section in the plane x r, Fig. 2. Fig. 5 is a section in the plane y y, Fig. 4. Fig. 6 shows a modification of my lock. Fig. 7 is a section in the plane z z, Fig. 6.

Similar letters indicate corresp onding parts. l

In the drawings, the letter A designates the casing oi' a mortise lock,whichis closed by the face-plate B, and provided with flanges O, by means of which it is secured to the door.

D is the latch, turning on a pivot, a, rising This latch, which,when the door is closed, catches behind a keeper, (not showin) which is usually secured to t-he doorcasing, may be turned on its pivot and disengaged from said keeper by either of the leverspindles E E', which carry the knobs F F', the operation of which will be hereinafter more fully described. From the rear end ofthe latch D extends a tail, b, which, when the lock is locked by the key, (sec Fig. 1,) rests against a finger, c, projecting from the lowerend of the tumbler G. This tumbler turns on a pivot, d, and its upper end is provided with an arm, e, against which the key Hoperates, and which is engaged by a swinging catch, I,which turns loosely on a pivot, f, rising from the casing A. This swinging catch is also actuated bythe key, and when the shoulder g on its lower edge rests under the arm a or. the tumbler, the laton its lower end comes under the tail b of the latch D, and locks the sameA in the position shown in Fig. 1. IVhen it is desired to release the latch, the key H is inserted in the lock and turned in the direction indicated by the arrow in Fig. 1,which will cause it to turn the swinging catch I onii's pivot toward the left unt-il the shoulder on thesame shall have been swung from under the arm coi" the tumbler. As the rotation of the keyis continued, it will also act on the arm c, moving it downward, and therebyturning the tumbler on its pivot, and permitting the swinging catch I to swing back to the position shown in Fig. 2, over the arm e, thereby holding the tumbler in that position., leaving thc latch D free to turn 'on its pivot a to the position shown in dotted lines in Fig. 2,when actuated by means of the knobs, thus enabling the door to be opened. When it is desired to again lock the latch D, the knobs being in their normal position, as indicated in full lines in Fig. 4, thc key is rotated in a direction opposite to that indicated by lthe arrow in Fig. 2, thereby swinging the shoulder g of the swinging latch I off from the tumbler,which action permits thelatterto turn on its pivot by its own gravity until the position shown in Fig. 1 is attained, when the shoulder g on the swinging latch will again swing under the arm e of the tumbler, as shown. in dotted lines in Fig. l, and the iinger c will pass under the tail b and lock the' latch in its outer position. It will beobserved that the catch I, when released from the operation of the key, swings toward the right by means of gravity, in which it is aided by the operation ofthe coiled spring z, wound around athe pivot f, one end, '1, of the spring bearing against the top of the casing A, and the other end being hooked to the catch I. I provide the catch I with a stop, X, which proj eets from its hub and extends toward the casing A, so as to bear against the casing at theend of the vibration ofthe catch toward the tumbler G, and stop the swing of the catch in that direction, and prevent the catch from covering the keyhole.

It will be understood that the lock may be locked by the key from either side ofthe door;

IOO

but I prefer to apply the key from the outside only. After the lock has been unlocked from the outside by the key, as above described, and the latch is free to turn on its pivot, I depress the tail end of the latch by the spindle E, which is pivoted by a horizontal pivot, q, in an escutcheon,J, secured to the outside of the door, and which carries the pendent knob F. Then this knob is raised, the inner end of the spindle, which rests on the tail b of the latch, is depressed, pushing the tail of the latch down with it, and turning the latch sufficiently on its pivot c to bring it completely into the casing, as shown in dotted lines in Fig. 2, and out of the keeper77 on the door-casing, thereby permitting the opening of the door.

To lock the door from the inside,I provide a rotating hub, K, which has its bearing in the face-plate and carries a hook, h. This hub is provided with a slot, z', extending through it, through which opening passes the hinged spindle E. The spindle, in addition toits'oscillating motion, can also be rotated, and by turning the same the hubKis also turned until the hook h passes beneath the tail b of the latch, thereby rmly locking the same in position. (See Fig. 3.) When it is desired to open the door from the inside, the spindle E is turned in the opposite direction, which action will, by turning the hub K back again, cause the hook h to release the tail b of the latch, bringing the parts K and `7i back to the position shown in Fig. 2. The pendent knob F is then raised to the position shown in dotted lines in Fig. 4i, thereby depressing the tail b of the latch, bringing the same completely into the lockcasing and permitting the door to be opened.

Each of the spindles E and E is made in two sections, which are connected by a hinge, F2, each section beingv provided with a shoulder, 1', which shoulders, when brought against each other, serve to limit the motion of the hinge-joint. The spindle E is made in this form to indicate the position of the rotating hub K, while the spindle E may be of one piece, but in the example shown in the drawings is made -to correspond to the other spindle, E. Vhen the door is unlocked, the parts of the lock being in the position shown in Fig. 2, the knob F will hang, as shown in full lines in Fig. 4; but when the door is locked from the inside the knob will stand out at right angles to the door, thereby indicating that the door is locked, and. that this knob must be turned to the pendent position before it can be opened.

To permit the formation of la close joint between the spindle E and the escutcheon L, I pivot said spindle in a thimble, M, which rotates easily in the escutcheon; but this thimble may be dispensed with and the spindle be arranged to rotate loosely in the escutcheon, being held from dropping out by a shoulder formed on the spindle. From this description and the drawings it will be understood that my lock can be locked and unlocked independently either from the inside or the outside, the locking of the latch D being accomplished from the outside by the key by means of the tumbler G and its tail-piece c, and from the inside by the knob F, spindle E', and hub K, and hook 7L by the engagement of thehook h with the tail-piece of the latch.

It is obvious that I can apply either of my locking devices so that they can be operated from both sides; but one of* the objects of my invention is to provide a look which cannot be opened from the outside when locked from the inside, and vice versa, and for this reason I have provided the independent latch-locking device, as shown and described.

Fig. 6 shows a modiiication of my lock, in which the tumbler, rests in a notch in the latch, D, instead of catching under the tail shown inthe other figures, and the lock canbe locked or unlocked by the key from either side of the door. This figure also shows a reversible latch, the convex part thereof N, which comes in contact with the keeper on the door casing or frame, being detachable and provided with steadying-pins m, which fit holes ain the bodyof the latch, to which the detachable portion is secured by a screw, o. By properly placing this detachable portion of the latch the lock may be applied to doors which swing either to the right or to the left. A guard-partition, p, of about the same depth as the casing A, is placed in the casing of the lock so as to cover the openings for the spindles, and to prevent tampering with the lock through these openings.

In all the iigures I have shown the tumbler G and the swinging catch I made of one solid piece of metal; but it is obvious that either or both may be made of two or more separate plates, and, together with proper key-guards, would greatly add to the security of the lock and increase the difficulty of picking.

When the latch D is free both from the locking-hook 7L and the catch c of the tumbler, it is free to be operated by the knobs F F, through their respective spindles E E', so that the latch can be withdrawn from its keeper from the outside as well as from the inside by lifting the appropriate knobs, and thereby causing their respective spindles to bear down upon the tail-piece of the latch, when the latch is to be withdrawn from the keeper and the door opened. .I do not, however, desire to confine myself to this form of independent spindle for actuating the latch, since said spindles, in-

stead of being mounted on pivots, so that vthey act as levers, may be constructed to rotate, and provided with eccentrics or cams, which, as the said spindles are rotated, will act on the tail b, turn the latch on its pivot, and draw the same into the lock-casing.

WhatIelaim as new, and desire to secure by Letters Patent, is-

1. rlhe combination, with the latch'l), the tumbler G, the swinging catch I, and a key formed to actuate both the tumbler and the IIO catch, of the spindles E E, each constructed to actuate the latch independent of the other substantially as described.

2. The combination, with the latch D, the

spindle E, the tumbler G, the swinging catchv I, and a key formed to actuate both the tumbler and the catch, of the hub K, the rotating hook h, constructed to engage the latch, and the spindle E', constructed to operate said hook, substantially as described.

3. The combination, with -the latch D, of the hub K, the rotating hook h, constructed to engage said latch, the sectional spindle E', constructed to. rotate said hook, the hinged connections between the sections of said spindle, and the shoulders o', substantially as described.

4. The combination, with the pivoted latch D, provided with a tail, b, of a pivoted tumbler, G, carrying on one side of its pivot a linger, c, constructed to engage said tail, and on the opposite side of its pivot an arm, e, a swinging catch, I, adapted to engage said arm, akey formed to actuate both the tumbler and the catch, and means, substantially as described, for actuating said latch, substantially as shown and described.

on the opposite side of its pivot an arm, e, a d

swinging catch, I, adapted to engage said arm, a key formed to actuate both the tumbler land 'the catch, means, substantially as described, for

actuating the latch from one side of the lock, the hub K, the rotating` hook h, and the spindle E', constructed to operate said rotating hook and constructed to actuate the latch from the other side of the lock, substantially as shown and described.

6. The combination, with the latch D, ofthe hub K, carrying the hook h, the pivoted lever-spindle E', constructed to rotate said hook and toactuate the latch, and the thimble M, carrying said spindle, substantially as described.

In testimony whereof I have hereunto set my hand and seal'in the presence of two subscribing witnesses.

FRANKLIN T. DAVIS. [L s] Vitnesses: y

OTTO I-IUFELAND, W. HAUFF. 

